An official site for the entire line of Cassandra Clare works: Mortal Instruments, Infernal Devices, Dark Artifices, Bane Chronicles, etc. All these works center around the Shadowhunters. This site is very helpful in providing data and content on each book in the series.
Managed by Sony Pictures, this official site will provide you with trailers for the film along with some other external links to other Mortal Instruments related content.
This link will lead you to the Official Facebook page for The Mortal Instruments. Students can use this social networking feature to catch up on new details while also conversing with other readers.
This link will lead you to the Official IMDB page for The Mortal Instruments: City of Bones film. IMDB offers cast lists, ratings, quotes, etc. If you are tying your study in with the film, IMDB is a great place to brush up on your film knowledge.